EP2421727A1 - Airbag module having an airbag with an adaptive ventilation opening - Google Patents

Airbag module having an airbag with an adaptive ventilation opening

Info

Publication number
EP2421727A1
EP2421727A1 EP10713581A EP10713581A EP2421727A1 EP 2421727 A1 EP2421727 A1 EP 2421727A1 EP 10713581 A EP10713581 A EP 10713581A EP 10713581 A EP10713581 A EP 10713581A EP 2421727 A1 EP2421727 A1 EP 2421727A1
Authority
EP
European Patent Office
Prior art keywords
slot
airbag
ventilation opening
tether
module according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10713581A
Other languages
German (de)
French (fr)
Other versions
EP2421727B1 (en
Inventor
Klaus-Peter KÜHNE
Karl-Heinz Sommer
Marc Schock
Marcus Weber
Jörg ALBERT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv Development AB
Original Assignee
Autoliv Development AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Autoliv Development AB filed Critical Autoliv Development AB
Publication of EP2421727A1 publication Critical patent/EP2421727A1/en
Application granted granted Critical
Publication of EP2421727B1 publication Critical patent/EP2421727B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23386—External tether means
    • B60R2021/23388—External tether means having ends which are movable or detachable during deployment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/239—Inflatable members characterised by their venting means
    • B60R2021/2395—Inflatable members characterised by their venting means comprising means to control the venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2342—Tear seams

Definitions

  • Airbag module with an adaptive ventilation opening having gas bag
  • the invention relates to an airbag module for installation in a motor vehicle with an airbag formed from a gas bag fabric and with an inflator for the airbag folded before release, wherein the airbag has at least one adaptive ventilation opening, which in the folded state before inflation of the airbag at least partially in a closed State is maintained, and wherein one with its one end releasably supported on the gas bag module or a vehicle-fixed part and provided with its other, the adaptive ventilation opening cross-end firmly connected to the gas bag tether is provided such that when inflated gas bag before the release of releasably content Erten At the end of the tether the tether tightened by the inflation pressure prevents an opening of the adaptive ventilation opening.
  • an airbag module with the aforementioned features is known from WO 03/006276 A2.
  • the adaptive ventilation opening formed on the generic object is concerned with keeping the ventilation opening closed before and also during the inflation of the airbag and allowing the release of the ventilation opening only at a definable point in time
  • a kind of tether provided and secured with its one end in the region of the adaptive ventilation opening on the airbag fabric, which completely covers and closes the ventilation opening in its initial or mounting position, and which is fixed on the other hand at its other end to a module-side holding device, that upon triggering of the holding device, the respective end of the tether is released.
  • the tether has such a dimension that it completely covers the vent opening.
  • the tether is further guided with its free end to the releasable holding device in the form of a detachable bolt and fixed with an end formed loop on the bolt.
  • the length of the tether is dimensioned so that is folded in the airbag of the tether overlapped area of the airbag fabric with the arranged therein and sealed by the tether ventilation opening and thus can not take his stretched position when inflating the airbag.
  • tear seams are provided for fixing the tether in its mounting position.
  • the tether releases the fabric area having the ventilation opening so that the area of the airbag defined by the tether fully unfolds and the adaptive ventilation opening completely opens due to the stretch of the gas bag fabric , while at the same time the tether is removed from the opening, so that the ventilation opening is released.
  • the disadvantage associated with the known airbag module is that the arrangement of the tether must be matched to the size of the adaptive ventilation opening according to dimension and attachment; Furthermore, the assembly of the airbag including the tether to be attached thereto in the gas bag is expensive.
  • the invention is therefore based on the object, in a gas bag module with the generic features, the closure of the adaptive ventilation Opening in front of their separately brought about release in a simple and effective way.
  • the adaptive ventilation opening is formed by a slot cut into the airbag fabric, at the two ends of which a design preventing the tearing of the slot under compressive stress is arranged and the adaptive ventilation opening arranged on the inside of the airbag overlapping tether passed through one of the attachment point of its one end with respect to the slot opposite to the gas bag fabric attached securing loop and then continued to the holder on the vehicle-fixed part.
  • the invention has the advantage that the introduction of the initially closed by the tether adaptive ventilation opening is easy to perform, as far as only a cutting of the airbag fabric and the attachment of the tearing of the slot in compressive stress preventing designs is required. Furthermore, no special requirements are to be placed on the tether in terms of its dimension or attachment in an advantageous manner. It is sufficient if the attached at one end to the gas bag tether extends over the slot-like adaptive ventilation opening and is attached to the other end of the airbag module or a vehicle-fixed part, so that the tether on deployment of the airbag, the emergence of the on the Slot acting tensile load and thus prevents premature opening of the adaptive ventilation opening.
  • the additionally provided arrangement of the securing loop has the advantage that a course of the tether at right angles to the course of the slot is ensured, so that the occurrence of lateral forces or transverse force components at an otherwise inclined to the course of the slot adjusting course of the tether at the deployment of the airbag is prevented.
  • an opening of the slot-like adaptive ventilation opening is reliably avoided until the release of the tether.
  • the securing loop consists of a transverse to the direction of the tether and connected at its two outer ends fixed to the airbag fabric fabric strip.
  • the tearing of the slot under pressure stress preventing design consist of a transverse to the longitudinal extent of the slot transverse seam.
  • the relevant design consists of a stop hole arranged at the end of the slot.
  • the adaptive ventilation opening designed in the form of the slot can be combined with at least one additionally provided standard ventilation opening.
  • the slot has a length such that set by the tether to the release of the tether closed slot section and at least one inflated when inflated airbag under pressure and a standard ventilation opening forming slot section ,
  • the slot area not held together by the tether first opens and thus forms the standard ventilation opening, while the slot area initially held together by the tether can only open after the tether has been released and thus forms the adaptive ventilation opening.
  • the complete release of the slot there is a ventilation opening with a correspondingly large cross section.
  • the tether overlaps the slot in a central arrangement and form at both ends of the slot each standard ventilation holes or that the tether overlaps the slot in one end and unilaterally in the other end region forms the standard ventilation opening.
  • the desired standard ventilation opening or further standard ventilation openings are formed as openings cut into the airbag fabric from the outset, for which purpose at least one of the embodiments according to the invention is advantageous provided stop holes of the slot can be used by the relevant stop hole is given such a large dimension that this stop hole itself serves as a standard ventilation opening.
  • the stop hole formed in the form of the standard ventilation opening fulfills a dual function.
  • one of the two stop holes is designed as unfolded gas bag as constantly open standard ventilation opening or that both stop holes are formed as unfolded airbag standard open standard ventilation openings.
  • the stop hole formed at one end of the slot than unfolded airbag constantly open standard ventilation opening is formed and the other end of the slot forming slot area opens upon pressure to a second standard ventilation opening, which is located under pressure between the ventilation openings located, overlapped by the tether slot area when releasing the tether, so that then a single ventilation opening is formed with a corresponding dimension.
  • Fig. 1 has an adaptive ventilation opening
  • FIG. 2 shows the subject matter of FIG. 1 with the adaptive ventilation opening released and opened
  • FIG. 3 shows the subject of Figure 1 with an additional, a
  • FIG. 4 shows the subject matter of FIG. 3 with the standard
  • FIG. 5 shows the subject matter of FIG. 4 with additionally opened adaptive ventilation opening
  • FIGS. 6-8 show the subject matter of FIGS. 3 to 5 with slot regions covered on both sides by the adaptive ventilation opening covered by the tether, in each case forming a standard ventilation opening;
  • FIG. 9 shows the subject matter of FIG. 1 with a standard ventilation opening cut into the airbag fabric instead of a stop hole located at the end of the slot with the adaptive ventilation opening initially closed
  • FIG. 10 shows the subject of FIG. 9 with additionally opened adaptive ventilation opening
  • Fig. 13 shows another embodiment with an adaptive
  • Ventilation opening forming slot area an adjoining, a standard ventilation opening forming slot area and a instead of one located at the end of the slot stop holes standard ventilation opening in a closed Z ⁇ stand,
  • FIG. 14 shows the subject matter of FIG. 13 with the standard open
  • Ventilation devices but still closed adaptive ventilation opening
  • Fig. 15 shows the subject of Figure 14 when fully open
  • a slot 1 1 is cut in a fabric area 10 of a not further shown, but in detail known from the generic WO 03/06276 A2 known airbag, which is surrounded in the illustrated embodiment by a circumference surrounding its reinforcing seam 12. It is clear that at a corresponding compressive stress of the cut into the tissue slot expands and thus forms a corresponding opening.
  • each stopper holes 21 are attached to both ends of the slot 1 1.
  • adaptive ventilation opening a consisting of a fabric strip tether 1 3 is provided, which is fixedly connected at one end 14 by means of an in a slot 1 1 immediately adjacent region attached sewing 15 with the fabric portion 10. From this suturing 15, the tether 13 is continued in a slot 1 1 cross-position and with its free end 16 in a well not shown, but also from the generic WO 03/006276 A2 known manner at a also not shown, arranged in the interior of the airbag airbag module or another vehicle-mounted part holding device connected such that the free end 1 6 of the tether 1 3 can be released due to appropriate signals.
  • the one directional leadership of the tether 13 after its release accepting securing loop 17 is relative to the slot 1 1 of suturing 1 5 mounted opposite to the fabric portion 10 and consists of the fabric strip 18, which is arranged transversely to the direction of the tether 13 and at its two outer ends is connected by means of fixed stitching 19 with the fabric portion 10.
  • the tether 13 in its the slot 1 1 overlapping position is secured such that the course of the tether 13 is secured approximately at right angles to the course of the slot 1 1 even with a corresponding tensile stress of the tether 13.
  • the occurrence of acting on the slot 1 1 lateral forces or transverse force components is avoided.
  • the attachment of the adaptive ventilation opening is now combined with the attachment of a standard ventilation opening, such as those standard ventilation openings being present in gas bags of known design. These standard ventilation openings are intended to allow the gas to escape at a corresponding admission pressure of the inflated airbag.
  • the slot 1 1 is divided into two regions 23 and 24. The area
  • the exemplary embodiment illustrated in FIGS. 6 to 8 differs from the exemplary embodiment previously described with reference to FIGS. 3 to 5 only in that the slot 11 is formed with such a length that on both sides of a central, overlapped by the tether 13 Slot region 23, which forms the adaptive ventilation opening, two slot portions 24 are provided to form a double standard ventilation opening 25, so that after complete release or opening of the slot 1 1 again results in a common ventilation opening, as already indicated in Figure 5.
  • the attachment of a standard ventilation opening in relation to the exemplary embodiments described with reference to FIGS. 3 to 8 is modified insofar as a slot area is not used as a standard ventilation opening for later expansion, but is a standard from the outset -Ventilationsö réelle 25 is formed by cutting a corresponding opening in the airbag fabric.
  • the standard ventilation opening 25 is now arranged instead of a stop hole 21, so that the standard ventilation opening 25, the function of the stop hole also takes over.
  • FIGS. 13 to 15 shows a combination of the embodiments described above with regard to the attachment of the standard ventilation opening, in which on the one hand, a stop hole as a standard ventilation opening 25 is formed from the outset, while additionally the slot 1 1 has a slot portion 24 for forming a standard ventilation opening under pressure.
  • a stop hole as a standard ventilation opening 25 is formed from the outset, while additionally the slot 1 1 has a slot portion 24 for forming a standard ventilation opening under pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

An airbag module for installing in a motor vehicle, having an airbag formed from an airbag fabric and having an inflation device for the airbag which is folded up before being triggered, wherein the airbag has at least one adaptive ventilation opening which, in the folded state before inflation of the airbag, is held at least partially in a closed state, and wherein a catch strap, which is detachably retained with one end thereof on the airbag module or a part fixed to the vehicle and which is fixedly connected with the other end thereof, which extends over the adaptive ventilation opening, to the airbag, is provided in such a way that, when the airbag is inflated, before the detachably retained end of the catch strap is released, the catch strap which is tensioned by the inflation pressure prevents the adaptive ventilation opening from opening, wherein the adaptive ventilation opening (20) is formed by a slot (11) cut into the airbag fabric (10), at the two ends of which slot (11) is provided a respective formation (21) which prevents the slot (11) from tearing under pressure loading, and in such a way that the catch strap, which is arranged on the inner side of the airbag and which extends over the slot (11) as the adaptive ventilation opening (20), is guided through a securing loop (17) which is attached to the airbag fabric opposite the fastening point (15) of the one end (14) of said catch strap with respect to the slot (11), and said catch strap is subsequently guided onward to the point at which it is retained on the part fixed to the vehicle.

Description

Gassackmodul mit einem eine adaptive Ventilationsöffnung aufweisenden Gassack Airbag module with an adaptive ventilation opening having gas bag
B e s c h r e i b u n gDescription
Die Erfindung betrifft ein Gassackmodul zum Einbau in ein Kraftfahrzeug mit einem aus einem Gassackgewebe gebildeten Gassack und mit einer Aufblasvorrichtung für den vor Auslösung eingefalteten Gassack, wobei der Gassack wenigstens eine adaptive Ventilationsöffnung aufweist, die in gefaltetem Zustand vor Aufblasen des Gassackes wenigstens teilweise in einem geschlossenen Zustand gehalten ist, und wobei ein mit seinem einen Ende lösbar an dem Gassackmodul oder einem fahrzeugfesten Teil gehaltertes und mit seinem anderen, die adaptive Ventilationsöffnung übergreifenden Ende fest mit dem Gassack verbundenes Fangband vorgesehen ist derart, dass bei aufgeblasenem Gassack vor der Freigabe des lösbar gehalterten Endes des Fangbandes das durch den Aufblasdruck gespannte Fangband eine Öffnung der adaptiven Ventilationsöffnung verhindert.The invention relates to an airbag module for installation in a motor vehicle with an airbag formed from a gas bag fabric and with an inflator for the airbag folded before release, wherein the airbag has at least one adaptive ventilation opening, which in the folded state before inflation of the airbag at least partially in a closed State is maintained, and wherein one with its one end releasably supported on the gas bag module or a vehicle-fixed part and provided with its other, the adaptive ventilation opening cross-end firmly connected to the gas bag tether is provided such that when inflated gas bag before the release of releasably content Erten At the end of the tether the tether tightened by the inflation pressure prevents an opening of the adaptive ventilation opening.
Ein Gassackmodul mit den vorgenannten Merkmalen ist aus der WO 03/006276 A2 bekannt. Soweit es bei der an dem gattungsgemäßen Gegenstand ausgebildeten adaptiven Ventilationsöffnung darum geht, die Ventilationsöffnung vor dem und auch während des Aufblasens des Gassackes verschlossen zu halten und die Freigabe der Ventilationsöffnung erst zu einem bestimmbaren Zeitpunkt zu ermöglichen, ist bei dem bekannten Gassackmodul eine Art Fangband vorgesehen und mit seinem einen Ende im Bereich der adaptiven Ventilationsöffnung an dem Gassackgewebe befestigt, welches einerseits in seiner Ausgangs- bzw. Montagelage die Ventilationsöffnung vollständig abdeckt und verschließt, und welches andererseits mit seinem anderen Ende so an einer modulseitigen Haltevorrichtung festgelegt ist, dass bei Auslösung der Haltevorrichtung das betreffende Ende des Fangbandes freigegeben wird. Das Fangband weist eine solche Abmessung auf, dass es die Ventöffnung vollständig abdeckt. Das Fangband ist weiterhin mit seinem freien Ende zu der lösbaren Haltevorrichtung in Form eines absprengbaren Bolzens geführt und mit einer endseitig ausgebildeten Schlaufe an dem Bolzen festgelegt. Die Länge des Fangbandes ist dabei so bemessen, dass bei eingefaltetem Gassack der von dem Fangband übergriffene Bereich des Gassackgewebes mit der darin angeordneten und von dem Fangband abgedichteten Ventilationsöffnung festgehalten ist und somit beim Aufblasen des Gassackes nicht seine gestreckte Lage einnehmen kann. Zusätzlich sind Reißnähte zur Fixierung des Fangbandes in dessen Montagelage vorgesehen. Erst nach der Aktivierung der Haltevorrichtung mit einer Freigabe des daran festgelegten Endes des Fangbandes gibt das Fangband den die Ventilationsöffnung aufweisenden Gewebebereich frei, so dass sich der von dem Fangband festgelegte Bereich des Gassackes vollständig entfaltet und sich aufgrund der Streckung des Gasackgewebes die adaptive Ventilationsöffnung vollständig öffnet, wobei dabei gleichzeitig das Fangband aus der Öffnung entfernt wird, so dass die Ventilationsöffnung freigegeben ist.An airbag module with the aforementioned features is known from WO 03/006276 A2. Insofar as the adaptive ventilation opening formed on the generic object is concerned with keeping the ventilation opening closed before and also during the inflation of the airbag and allowing the release of the ventilation opening only at a definable point in time, in the case of the known airbag module a kind of tether provided and secured with its one end in the region of the adaptive ventilation opening on the airbag fabric, which completely covers and closes the ventilation opening in its initial or mounting position, and which is fixed on the other hand at its other end to a module-side holding device, that upon triggering of the holding device, the respective end of the tether is released. The tether has such a dimension that it completely covers the vent opening. The tether is further guided with its free end to the releasable holding device in the form of a detachable bolt and fixed with an end formed loop on the bolt. The length of the tether is dimensioned so that is folded in the airbag of the tether overlapped area of the airbag fabric with the arranged therein and sealed by the tether ventilation opening and thus can not take his stretched position when inflating the airbag. In addition, tear seams are provided for fixing the tether in its mounting position. Only after the activation of the holding device with a release of the fixed thereto end of the tether the tether releases the fabric area having the ventilation opening so that the area of the airbag defined by the tether fully unfolds and the adaptive ventilation opening completely opens due to the stretch of the gas bag fabric , while at the same time the tether is removed from the opening, so that the ventilation opening is released.
Mit dem bekannten Gassackmodul ist der Nachteil verbunden, dass die Anordnung des Fangbandes nach Abmessung und Befestigung auf die jeweilige Größe der adaptiven Ventilationsöffnung abgestimmt sein muss; weiterhin ist die Montage des Gassackes einschließlich des daran anzubringenden Fangbandes in dem Gassack aufwendig.The disadvantage associated with the known airbag module is that the arrangement of the tether must be matched to the size of the adaptive ventilation opening according to dimension and attachment; Furthermore, the assembly of the airbag including the tether to be attached thereto in the gas bag is expensive.
Der Erfindung liegt daher die Aufgabe zugrunde, bei einem Gassackmodul mit den gattungsgemäßen Merkmalen den Verschluss der adaptiven Ventilations- Öffnung vor deren gesondert herbeizuführenden Freigabe in einfacher und wirkungsvoller Weise auszugestalten.The invention is therefore based on the object, in a gas bag module with the generic features, the closure of the adaptive ventilation Opening in front of their separately brought about release in a simple and effective way.
Die Lösung dieser Aufgabe ergibt sich einschließlich vorteilhafter Ausgestaltungen und Weiterbildungen der Erfindung aus dem Inhalt der Patentansprüche, welche dieser Beschreibung nachgestellt sind.The solution to this problem arises, including advantageous refinements and developments of the invention from the content of the claims, which are adjusted to this description.
Die Erfindung sieht in ihrem Grundgedanken vor, dass die adaptive Ventilationsöffnung durch einen in das Gassackgewebe eingeschnittenen Schlitz gebildet ist, an dessen beiden Enden eine das Einreißen des Schlitzes bei Druckbeanspruchung verhindernde Gestaltung angeordnet ist und dass das an der Innenseite des Gassackes angeordnete und die adaptive Ventilationsöffnung übergreifende Fangband durch eine der Befestigungsstelle seines einen Endes bezüglich des Schlitzes gegenüberliegend an dem Gassackgewebe angebrachte Sicherungsschlaufe geführt und anschließend zu der Halterung an dem fahrzeugfesten Teil weitergeführt ist.The basic idea of the invention is that the adaptive ventilation opening is formed by a slot cut into the airbag fabric, at the two ends of which a design preventing the tearing of the slot under compressive stress is arranged and the adaptive ventilation opening arranged on the inside of the airbag overlapping tether passed through one of the attachment point of its one end with respect to the slot opposite to the gas bag fabric attached securing loop and then continued to the holder on the vehicle-fixed part.
Mit der Erfindung ist der Vorteil verbunden, dass das Einbringen der zunächst durch das Fangband verschlossenen adaptiven Ventilationsöffnung einfach durchzuführen ist, soweit dafür nur ein Einschneiden des Gassackgewebes sowie die Anbringung der das Einreißen des Schlitzes bei Druckbeanspruchung verhindernden Gestaltungen erforderlich ist. Weiterhin sind in vorteilhafter Weise keine besonderen Anforderungen an das Fangband hinsichtlich dessen Abmessung oder Befestigung zu stellen. Es reicht aus, wenn das mit einem Ende am Gassack befestigte Fangband sich über die schlitzartige adaptive Ventilationsöffnung erstreckt und mit seinem anderen Ende lösbar an dem Gassackmodul oder einem fahrzeugfesten Teil angeschlagen ist, so dass das Fangband bei dem Entfalten des Gassackes das Entstehen einer auf den Schlitz einwirkenden Zugbelastung und damit ein vorzeitiges Öffnen der adaptiven Ventilationsöffnung verhindert. Wird das Fangband mittels einer entsprechend vorgesehenen Vorrichtung bewusst frei gegeben, so führt die dadurch ermöglichte Streckung der durch das Fangband zunächst aneinander gekoppelten, beidseits des Schlitzes befindlichen Gewebebereiche zu einer Öffnung des Schlitzes und damit zu einer Freigabe der adaptiven Ventilationsöffnung. Mit der zusätzlich noch vorgesehenen Anordnung der Sicherungsschlaufe ist der Vorteil verbunden, dass ein Verlauf des Fangbandes im rechten Winkel zum Verlauf des Schlitzes sichergestellt ist, so dass das Auftreten von Querkräften beziehungsweise Querkraftkomponenten bei einem sich ansonsten schräg zum Verlauf des Schlitzes einstellenden Verlauf des Fangbandes bei der Entfaltung des Gassackes verhindert ist. Damit wird bis zur Freigabe des Fangbandes eine Öffnung der schlitzartigen adaptiven Ventilationsöffnung sicher vermieden.The invention has the advantage that the introduction of the initially closed by the tether adaptive ventilation opening is easy to perform, as far as only a cutting of the airbag fabric and the attachment of the tearing of the slot in compressive stress preventing designs is required. Furthermore, no special requirements are to be placed on the tether in terms of its dimension or attachment in an advantageous manner. It is sufficient if the attached at one end to the gas bag tether extends over the slot-like adaptive ventilation opening and is attached to the other end of the airbag module or a vehicle-fixed part, so that the tether on deployment of the airbag, the emergence of the on the Slot acting tensile load and thus prevents premature opening of the adaptive ventilation opening. If the tether is deliberately released by means of a correspondingly provided device, then the stretching that is made possible by the treadmill that leads through the Tether initially coupled to each other, located on both sides of the slot tissue areas to an opening of the slot and thus to a release of the adaptive ventilation opening. With the additionally provided arrangement of the securing loop has the advantage that a course of the tether at right angles to the course of the slot is ensured, so that the occurrence of lateral forces or transverse force components at an otherwise inclined to the course of the slot adjusting course of the tether at the deployment of the airbag is prevented. Thus, an opening of the slot-like adaptive ventilation opening is reliably avoided until the release of the tether.
Nach einem Ausführungsbeispiel der Erfindung ist vorgesehen, dass die Sicherungsschlaufe aus einem quer zur Verlaufsrichtung des Fangbandes angeordneten und an seinen beiden äußeren Enden fest mit dem Gassackgewebe verbundenen Gewebestreifen besteht.According to one embodiment of the invention it is provided that the securing loop consists of a transverse to the direction of the tether and connected at its two outer ends fixed to the airbag fabric fabric strip.
Es kann in an sich bekannter Weise vorgesehen sein, dass die das Ende des Fangbandes aufnehmende Halterung an einem im Inneren des Gassackes liegenden Teil des Gassackmoduls angeschlagen ist.It may be provided in a conventional manner that the end of the tether receiving holder is struck on a lying in the interior of the airbag portion of the airbag module.
In einer ersten Ausgestaltung der Erfindung kann die das Einreißen des Schlitzes bei Druckbeanspruchung verhindernde Gestaltung aus einer quer zur Längserstreckung des Schlitzes verlaufenden Quernaht bestehen.In a first embodiment of the invention, the tearing of the slot under pressure stress preventing design consist of a transverse to the longitudinal extent of the slot transverse seam.
Es ist j edoch zweckmäßig und für die Ausbildung weiterer Ausführungsformen der Erfindung vorteilhaft, wenn die betreffende Gestaltung aus einem am Ende des Schlitzes angeordneten Stopploch besteht.However, it is expedient and advantageous for the formation of further embodiments of the invention if the relevant design consists of a stop hole arranged at the end of the slot.
Soweit in einem üblichen Gassack, wie auch in der gattungsbildenden WO 03/006376 A2 beschrieben, neben einer adaptiven Ventilationsöffnung auch eine oder mehrere Standard-Ventilationsöffnungen ausgebildet sind, die ein Abströmen des Gases auch bei einem unterhalb des für die Öffnung der adaptiven Ventilationsöffnung voreingestellten Druckes liegenden Beaufschlagungsdruck ermöglich, ist in einer Ausführungsform der Erfindung vorgesehen, die erfindungsgemäß in Form des Schlitzes ausgebildete adaptive Ventilationsöffnung mit zumindest einer zusätzlich vorgesehenen Standard- Ventilationsöffnung zu kombinieren. Dies ist nach einem Ausführungsbeispiel der Erfindung dadurch vorgesehen, dass der Schlitz eine derartige Länge aufweist, dass sich ein durch das Fangband bis zur Freigabe des Fangbandes geschlossen gehaltener Schlitzabschnitt und wenigstens ein sich bei aufgeblasenem Gassack unter Druckeinwirkung öffnender und eine Standard- Ventilationsöffnung ausbildender Schlitzabschnitt einstellen. Beim Aufblasen des Gassackes öffnet sich zunächst der nicht durch das Fangband zusammengehaltene Schlitzbereich und bildet somit die Standard- Ventilationsöffnung aus, während der durch das Fangband zunächst zusammengehaltene Schlitzbereich erst nach Freigabe des Fangbandes sich öffnen kann und somit die adaptive Ventilationsöffnung ausbildet. Nach der vollständigen Freigabe des Schlitzes liegt eine Ventilationsöffnung mit einem entsprechend großen Querschnitt vor.As far as described in a conventional airbag, as well as in the generic text WO 03/006376 A2, in addition to an adaptive ventilation opening and one or more standard ventilation openings are formed, the outflow of the gas even at a below the opening for the In one embodiment of the invention, the adaptive ventilation opening designed in the form of the slot can be combined with at least one additionally provided standard ventilation opening. This is provided according to an embodiment of the invention in that the slot has a length such that set by the tether to the release of the tether closed slot section and at least one inflated when inflated airbag under pressure and a standard ventilation opening forming slot section , When the airbag is inflated, the slot area not held together by the tether first opens and thus forms the standard ventilation opening, while the slot area initially held together by the tether can only open after the tether has been released and thus forms the adaptive ventilation opening. After the complete release of the slot there is a ventilation opening with a correspondingly large cross section.
Im Rahmen einer solchen Ausbildung des Schlitzes kann nach unterschiedlichen Ausführungsbeispielen vorgesehen sein, dass das Fangband den Schlitz in einer mittigen Anordnung dazu übergreift und sich an beiden Enden des Schlitzes jeweils Standard-Ventilationsöffnungen ausbilden oder dass das Fangband den Schlitz in dessen einem Endbereich übergreift und sich einseitig in dem anderen Endbereich die Standard-Ventilationsöffnung ausbildet.In the context of such a design of the slot can be provided for different embodiments that the tether overlaps the slot in a central arrangement and form at both ends of the slot each standard ventilation holes or that the tether overlaps the slot in one end and unilaterally in the other end region forms the standard ventilation opening.
In einer alternativen Ausführungsform kann hinsichtlich der Ausbildung von Standard-Ventilationsöffnungen vorgesehen sein, dass die gewünschte Standard-Ventilationsöffnung beziehungsweise weitere Standard- Ventilationsöffnungen als von vorneherein in das Gassackgewebe eingeschnittene Öffnungen ausgebildet sind, wofür in vorteilhafter Weise zumindest eines der nach einem Ausführungsbeispiel der Erfindung vorgesehenen Stopplöcher des Schlitzes genutzt werden kann, indem dem betreffenden Stopploch eine so große Abmessung gegeben ist, dass dieses Stopploch selbst als Standard-Ventilationsöffnung dient. Somit erfüllt das in Form der Standard-Ventilationsöffnung ausgebildete Stopploch eine Doppelfunktion.In an alternative embodiment, it can be provided with regard to the formation of standard ventilation openings that the desired standard ventilation opening or further standard ventilation openings are formed as openings cut into the airbag fabric from the outset, for which purpose at least one of the embodiments according to the invention is advantageous provided stop holes of the slot can be used by the relevant stop hole is given such a large dimension that this stop hole itself serves as a standard ventilation opening. Thus, the stop hole formed in the form of the standard ventilation opening fulfills a dual function.
Hierzu kann in unterschiedlichen Ausführungsbeispielen der Erfindung vorgesehen sein, dass eines der beiden Stopplöcher als bei entfaltetem Gassack als ständig offene Standard-Ventilationsöffnung ausgebildet ist oder dass beide Stopplöcher als bei entfaltetem Gassack ständig offene Standard- Ventilationsöffnungen ausgebildet sind.For this purpose, it can be provided in different embodiments of the invention that one of the two stop holes is designed as unfolded gas bag as constantly open standard ventilation opening or that both stop holes are formed as unfolded airbag standard open standard ventilation openings.
Gemäß einem weiteren Ausführungsbeispiel der Erfindung ist es auch vorgesehen, unterschiedliche Ausbildungen hinsichtlich einer zusätzlichen Standard-Ventilationsöffnung zu kombinieren, und hierzu kann vorgesehen sein, dass bei einer mittigen Anordnung des den Schlitz übergreifenden Fangbandes das an einem Ende des Schlitzes ausgebildete Stopploch als bei entfaltetem Gassack ständig offene Standard-Ventilationsöffnung ausgebildet ist und der das andere Ende des Schlitzes bildende Schlitzbereich sich bei Druckeinwirkung zu einer zweiten Standard-Ventilationsöffnung öffnet, wobei der bei Druckeinwirkung zwischen den Ventilationsöffnungen gelegene, von dem Fangband übergriffene Schlitzbereich bei Freigabe des Fangbandes freigegeben wird, so dass danach eine einzige Ventilationsöffnung mit entsprechender Abmessung gebildet ist.According to a further embodiment of the invention, it is also provided to combine different configurations with respect to an additional standard ventilation opening, and it can be provided that in a central arrangement of the slot cross-tether the stop hole formed at one end of the slot than unfolded airbag constantly open standard ventilation opening is formed and the other end of the slot forming slot area opens upon pressure to a second standard ventilation opening, which is located under pressure between the ventilation openings located, overlapped by the tether slot area when releasing the tether, so that then a single ventilation opening is formed with a corresponding dimension.
Zur weiteren Absicherung gegen eine vorzeitige Öffnung des Schlitzes kann nach einem Ausführungsbeispiel der Erfindung vorgesehen sein, dass der Schlitz von einer die Gewebebereiche beidseits des Schlitzes erfassenden Reißnaht übergriffen ist. Hiermit ist auch eine Öffnung des Schlitzes in den Bereichen verhindert, in denen sich Standard-Ventilationsöffnungen ausbilden sollen, jedenfalls bis beim Aufblasen des Gassackes ein entsprechender Innendruck beziehungsweise ein entsprechender Belastungsdruck gegeben ist. In der Zeichnung sind Ausführungsbeispiele der Erfindung wiedergegeben, welche nachstehend beschrieben sind. Es zeigen:For further protection against premature opening of the slot, according to one embodiment of the invention, provision may be made for the slot to be overlapped by a tear seam engaging the fabric regions on both sides of the slot. This also prevents opening of the slot in the areas in which standard ventilation openings are to be formed, in any case until the gas bag is inflated by a corresponding internal pressure or a corresponding load pressure. In the drawings, embodiments of the invention are shown, which are described below. Show it:
Fig. 1 einen eine adaptive Ventilationsöffnung aufweisendenFig. 1 has an adaptive ventilation opening
Gewebebereich eines Gassackes mit einem darin eingebrachten Schlitz in einer Draufsicht auf die Innenseite des Gassackgewebes bei geschlossener adaptiver Ventilationsöffnung,Tissue region of a gas bag with a slot inserted therein in a plan view of the inside of the airbag fabric with the adaptive ventilation opening closed,
Fig. 2 den Gegenstand der Figur 1 bei freigegebener und geöffneter adaptiver Ventilationsöffnung,2 shows the subject matter of FIG. 1 with the adaptive ventilation opening released and opened,
Fig. 3 den Gegenstand der Figur 1 mit einem zusätzlichen, eineFig. 3 shows the subject of Figure 1 with an additional, a
Standard-Ventilationsöffnung ausbildenden Schlitzbereich in geschlossenem Zustand,Standard ventilation opening forming slot area in the closed state,
Fig. 4 den Gegenstand der Figur 3 bei geöffneter Standard-4 shows the subject matter of FIG. 3 with the standard
Ventilationsöffnung, jedoch bei weiterhin geschlossener adaptiver Ventilationsöffnung,Ventilation opening, but with the adaptive ventilation opening still closed,
Fig. 5 den Gegenstand der Figur 4 bei zusätzlich geöffneter adaptiver Ventilationsöffnung,5 shows the subject matter of FIG. 4 with additionally opened adaptive ventilation opening,
Fig. 6 - 8 den Gegenstand der Figuren 3 bis 5 mit beidseits der durch das Fangband überdeckten adaptiven Ventilationsöffnung angeordneten, j eweils eine Standard-Ventilationsöffnung ausbildenden Schlitzbereichen,FIGS. 6-8 show the subject matter of FIGS. 3 to 5 with slot regions covered on both sides by the adaptive ventilation opening covered by the tether, in each case forming a standard ventilation opening;
Fig. 9 den Gegenstand der Figur 1 mit einer in das Gassackgewebe anstelle eines am Ende des Schlitzes befindlichen Stopploches eingeschnittenen Standard-Ventilationsöffnung bei zunächst geschlossener adaptiver Ventilationsöffnung, Fig. 1 0 den Gegenstand der Figur 9 bei zusätzlich geöffneter adaptiver Ventilationsöffnung,9 shows the subject matter of FIG. 1 with a standard ventilation opening cut into the airbag fabric instead of a stop hole located at the end of the slot with the adaptive ventilation opening initially closed, FIG. 10 shows the subject of FIG. 9 with additionally opened adaptive ventilation opening, FIG.
Fig. 1 1 - 12 den Gegenstand der Figuren 9 und 10 mit beidseits der durch das Fangband überdeckten adaptiven Ventilationsöffnung angeordneten, anstelle der am Ende des Schlitzes befindlichen Stopplöcher eingeschnittenen Standard-Ventilationsöffnungen,1 1 - 12 arranged the subject matter of Figures 9 and 10 with both sides of the covered by the tether adaptive ventilation opening, instead of the located at the end of the slot stop holes standard ventilation openings,
Fig. 13 eine weitere Ausführungsform mit einem eine adaptiveFig. 13 shows another embodiment with an adaptive
Ventilationsöffnung ausbildenden Schlitzbereich, einem daran anschließenden, eine Standard-Ventilationsöffnung ausbildenden Schlitzbereich sowie einer anstelle eines am Ende des Schlitzes befindlichen Stopplochen eingeschnittenen Standard-Ventilationsöffnung in geschlossenem Zμstand,Ventilation opening forming slot area, an adjoining, a standard ventilation opening forming slot area and a instead of one located at the end of the slot stop holes standard ventilation opening in a closed Zμstand,
Fig. 14 den Gegenstand der Figur 13 bei geöffneten Standard-14 shows the subject matter of FIG. 13 with the standard open
Ventilationseinrichtungen, jedoch weiterhin geschlossener adaptiver Ventilationsöffnung,Ventilation devices, but still closed adaptive ventilation opening,
Fig. 15 den Gegenstand der Figur 14 bei vollständig geöffneterFig. 15 shows the subject of Figure 14 when fully open
Ventilationsöffnung.Ventilation opening.
In den Figuren 1 und 2 ist zunächst ein Ausführungsbeispiel dargestellt, bei welchem nur eine adaptive Ventilationsöffnung verwirklicht ist. Hierzu ist in einen Gewebebereich 10 eines nicht weiter dargestellten, in einzelnen aber aus der gattungsbildenden WO 03/06276 A2 bekannten Gassackes ein Schlitz 1 1 eingeschnitten, der bei dem dargestellten Ausführungsbeispiel von einer seinen Umfang umschließenden Verstärkungsnaht 12 umgeben ist. Es ist einsichtig, dass bei einer entsprechenden Druckbeanspruchung sich der in das Gewebe eingeschnittene Schlitz aufweitet und somit eine entsprechende Öffnung ausbildet. Um ein Einreißen des in den Gewebebereich 10 eingeschnittenen Schlitzes 1 1 bei entsprechender Druckbeanspruchung zu verhindern, sind an beiden Enden des Schlitzes 1 1 jeweils Stopplöcher 21 angebracht.In the figures 1 and 2, an embodiment is first shown, in which only an adaptive ventilation opening is realized. For this purpose, a slot 1 1 is cut in a fabric area 10 of a not further shown, but in detail known from the generic WO 03/06276 A2 known airbag, which is surrounded in the illustrated embodiment by a circumference surrounding its reinforcing seam 12. It is clear that at a corresponding compressive stress of the cut into the tissue slot expands and thus forms a corresponding opening. In order to prevent tearing of the slit 1 1 cut into the fabric area 10 with corresponding compressive stress Prevent, each stopper holes 21 are attached to both ends of the slot 1 1.
Zur Einstellung einer durch den Schlitz 1 1 vorgegebenen adaptiven Ventilationsöffnung ist ein aus einem Gewebestreifen bestehendes Fangband 1 3 vorgesehen, welches mit seinem einen Ende 14 mittels einer in einem dem Schlitz 1 1 unmittelbar benachbarten Bereich angebrachten Vernähung 15 mit dem Gewebebereich 10 fest verbunden ist. Von dieser Vernähung 15 ist das Fangband 13 in einer den Schlitz 1 1 übergreifenden Lage weitergeführt und mit seinem freien Ende 16 in einer ebenfalls nicht weiter dargestellten, jedoch gleichfalls aus der gattungsbildenden WO 03/006276 A2 bekannten Weise an einer an dem ebenfalls nicht dargestellten, im Inneren des Gassackes angeordneten Gassackmodul oder einem anderen fahrzeugfesten Teil befindlichen Haltevorrichtung derart angeschlossen, dass das freie Ende 1 6 des Fangbandes 1 3 aufgrund entsprechender Signale freigegeben werden kann.To set a predetermined by the slot 1 1 adaptive ventilation opening a consisting of a fabric strip tether 1 3 is provided, which is fixedly connected at one end 14 by means of an in a slot 1 1 immediately adjacent region attached sewing 15 with the fabric portion 10. From this suturing 15, the tether 13 is continued in a slot 1 1 cross-position and with its free end 16 in a well not shown, but also from the generic WO 03/006276 A2 known manner at a also not shown, arranged in the interior of the airbag airbag module or another vehicle-mounted part holding device connected such that the free end 1 6 of the tether 1 3 can be released due to appropriate signals.
Die eine gerichtete Führung des Fangbandes 13 nach dessen Freigabe übernehmende Sicherungsschlaufe 17 ist bezüglich des Schlitzes 1 1 der Vernähung 1 5 gegenüberliegend an dem Gewebebereich 10 angebracht und besteht aus dem Gewebestreifen 18, der quer zur Verlaufsrichtung des Fangbandes 13 angeordnet und an seinen beiden äußeren Enden mittels fester Vernähungen 19 mit dem Gewebebereich 10 verbunden ist. Durch die Anbringung der Sicherheitsschlaufe 17 ist das Fangband 13 in seiner den Schlitz 1 1 übergreifenden Lage gesichert derart, dass der Verlauf des Fangbandes 13 etwa im rechten Winkel zum Verlauf des Schlitzes 1 1 auch bei einer entsprechenden Zugbeanspruchung des Fangbandes 13 sichergestellt ist. Damit wird das Auftreten von auf den Schlitz 1 1 einwirkenden Querkräften beziehungsweise Querkraftkomponenten vermieden.The one directional leadership of the tether 13 after its release accepting securing loop 17 is relative to the slot 1 1 of suturing 1 5 mounted opposite to the fabric portion 10 and consists of the fabric strip 18, which is arranged transversely to the direction of the tether 13 and at its two outer ends is connected by means of fixed stitching 19 with the fabric portion 10. By attaching the safety loop 17, the tether 13 in its the slot 1 1 overlapping position is secured such that the course of the tether 13 is secured approximately at right angles to the course of the slot 1 1 even with a corresponding tensile stress of the tether 13. Thus, the occurrence of acting on the slot 1 1 lateral forces or transverse force components is avoided.
Wird das freie Ende 16 des Fangbandes 13 durch die nicht weiter dargestellte Haltevorrichtung freigegeben, so zieht sich das Fangband 13 bei der durch den auf das Gassackgewebe einwirkenden Innendruck herbeigeführten Aufweitung des Schlitzes 1 1 durch die Sicherungsschlaufe 17 und hindert somit die Öffnung des Schlitzes 1 1 zu der in Figur 2 in geöffnetem Zustand dargestellten adaptiven Ventilationsöffnung 20 nicht. Soweit der Zusammenhalt der beiden durch den Schlitz 1 1 getrennten Gewebebereiche durch eine den Schlitz 1 1 übergreifende Reißnaht zur Vermeidung von Leckagen verbessert sein kann, reißt diese Reißnaht auf, so dass in Figur 2 deren Enden 22 ersichtlich sind.If the free end 16 of the tether 13 released by the holding device, not shown, so the tether 13 pulls in by The expansion of the slot 1 1 caused by the securing loop 17 and thus causing the internal air pressure acting on the airbag fabric does not hinder the opening of the slot 11 to the adaptive ventilation opening 20 shown in FIG. As far as the cohesion of the two separated by the slot 1 1 tissue areas can be improved by a slot 1 1 cross-tear seam to prevent leaks, tears this tear seam, so that in Figure 2, the ends 22 are visible.
Bei dem in den Figuren 3 bis 5 dargestellten Ausführungsbeispiel ist nun die Anbringung der adaptiven Ventilationsöffnung kombiniert mit der Anbringung einer Standard-Ventilationsöffnung, wie derartige Standard- Ventilationöffnungen bei Gassäcken bekannter Ausbildung vorhanden sind. Diese Standard-Ventilationsöffnungen sollen ein Abströmen des Gases bei einem entsprechenden Beaufschlagungsdruck des aufgeblasenen Gassackes ermöglichen. Bei dem in den Figuren 3 bis 5 dargestellten Ausführungsbeispiel ist der Schlitz 1 1 in zwei Bereiche 23 und 24 unterteilt. Der BereichIn the embodiment illustrated in FIGS. 3 to 5, the attachment of the adaptive ventilation opening is now combined with the attachment of a standard ventilation opening, such as those standard ventilation openings being present in gas bags of known design. These standard ventilation openings are intended to allow the gas to escape at a corresponding admission pressure of the inflated airbag. In the embodiment shown in Figures 3 to 5, the slot 1 1 is divided into two regions 23 and 24. The area
23 ist von dem Fangband 13 übergriffen und somit zusammengehalten, so dass sich in diesem Schlitzbereich 23 die adaptive Ventilationsöffnung ausbilden kann. Der andere Schlitzbereich 24 ist freigehalten, so dass nach Aufblasen des Gassackes bei entsprechender Druckeinwirkung sich dieser Schlitzbereich23 is overlapped by the tether 13 and thus held together, so that in this slot area 23, the adaptive ventilation opening can form. The other slot area 24 is kept free, so that after inflation of the airbag with appropriate pressure, this slot area
24 zu einer Standard-Ventilationsöffnung 25 öffnet, wie dies in Figur 4 dargestellt ist. In diesem Zustand ist die adaptive Ventilationsöffnung zunächst noch nicht freigegeben. Dieser Freigabezustand ist dann in Figur 5 wiedergegeben, bei welchem das Fangband 13 durch Lösen der Haltevorrichtung freigegeben ist, so dass sich eine gemeinsame Ventilationsöffnung 26 mit einem entsprechenden Öffnungsquerschnitt ergibt.24 to a standard ventilation opening 25 opens, as shown in Figure 4. In this state, the adaptive ventilation opening is not yet released. This release state is then reproduced in Figure 5, in which the tether 13 is released by releasing the holding device, so that there is a common ventilation opening 26 with a corresponding opening cross-section.
Das in den Figuren 6 bis 8 dargestellte Ausführungsbeispiel unterscheidet sich von dem zuvor zu Figuren 3 bis 5 beschriebenen Ausführungsbeispiel nur dadurch, dass der Schlitz 1 1 mit einer solchen Länge ausgebildet ist, dass beidseits eines mittleren, von dem Fangband 13 übergriffenen Schlitzbereiches 23 , der die adaptive Ventilationsöffnung ausbildet, zwei Schlitzbereiche 24 zur Ausbildung einer doppelten Standard- Ventilationsöffnung 25 vorgesehen sind, so dass nach vollständiger Freigabe beziehungsweise Öffnung des Schlitzes 1 1 sich wiederum eine gemeinsame Ventilations-öffnung ergibt, wie bereits zu Figur 5 angegeben.The exemplary embodiment illustrated in FIGS. 6 to 8 differs from the exemplary embodiment previously described with reference to FIGS. 3 to 5 only in that the slot 11 is formed with such a length that on both sides of a central, overlapped by the tether 13 Slot region 23, which forms the adaptive ventilation opening, two slot portions 24 are provided to form a double standard ventilation opening 25, so that after complete release or opening of the slot 1 1 again results in a common ventilation opening, as already indicated in Figure 5.
Bei dem in Figuren 9 und 10 dargestellten Ausführungsbeispiel ist das Anbringen einer Standard-Ventilationsöffnung gegenüber den zu den Figuren 3 bis 8 beschriebenen Ausführungsbeispielen nun insoweit geändert, als nicht ein Schlitzbereich für eine spätere Aufweitung als Standard- Ventilationsöffnung herangezogen ist, sondern von vorneherein eine Standard-Ventilationsöffnung 25 durch Einschneiden einer entsprechenden Öffnung in das Gassackgewebe ausgebildet ist. Soweit es ohnehin zweckmäßig ist, an den diesbezüglichen Enden des Schlitzes 1 1 , wie zu Figur 1 beschrieben, Stopplöcher 21 anzubringen, ist nun die Standard- Ventilationsöffnung 25 anstelle eines Stopploches 21 angeordnet, so dass die Standard-Ventilationsöffnung 25 die Funktion des Stopploches ebenfalls übernimmt. Insofern kommt es bei dem Ausführungsbeispiel gemäß Figuren 9 und 10 zu einer Freigabe des Schlitzes 1 1 in der zu Figur 1 beschriebenen Weise mit Ausbildung einer adaptiven Ventilationsöffnung 20, so dass sich bei Freigabe des Fangbandes im Ergebnis eine gemeinsame Ventilationsöffnung 26 wiederum ergibt, wie zu Figuren 3 bis 8 beschrieben.In the exemplary embodiment illustrated in FIGS. 9 and 10, the attachment of a standard ventilation opening in relation to the exemplary embodiments described with reference to FIGS. 3 to 8 is modified insofar as a slot area is not used as a standard ventilation opening for later expansion, but is a standard from the outset -Ventilationsöffnung 25 is formed by cutting a corresponding opening in the airbag fabric. As far as it is expedient anyway, at the relevant ends of the slot 1 1, as described for Figure 1, to install stop holes 21, the standard ventilation opening 25 is now arranged instead of a stop hole 21, so that the standard ventilation opening 25, the function of the stop hole also takes over. In this respect, it comes in the embodiment according to Figures 9 and 10 to a release of the slot 1 1 in the manner described with respect to Figure 1 with the formation of an adaptive ventilation opening 20, so that when releasing the tether as a result, a common ventilation opening 26 again results, as to Figures 3 to 8 described.
Das in Figuren 1 1 und 12 wiedergegebene Ausführungsbeispiel unterscheidet sich von dem zuvor zu Figuren 9 und 10 beschriebenen Ausführungsbeispiel wiederum nur dadurch, dass analog zum Ausführungsbeispiel gemäß Figuren 6 bis 8 zu beiden Seiten des Schlitzes 1 1 die Stopplöcher als Standard- Ventilationsöffnungen 25 ausgebildet sind.The illustrated in Figures 1 1 and 12 embodiment again differs from the embodiment previously described Figures 9 and 10 only in that analogous to the embodiment of Figures 6 to 8 on both sides of the slot 1 1, the stop holes are formed as standard ventilation openings 25 ,
Das in den Figuren 13 bis 15 schließlich dargestellte Ausführungsbeispiel zeigt eine Kombination der vorstehend beschriebenen Ausführungsbeispiele hinsichtlich der Anbringung der Standard-Ventilationsöffnung, bei welchem einerseits ein Stopploch als Standard-Ventilationsöffnung 25 von vorneherein ausgebildet ist, während zusätzlich der Schlitz 1 1 einen Schlitzbereich 24 zur Ausbildung einer Standard-Ventilationsöffnung unter Druckeinwirkung aufweist. Auch hier stellt sich bei Freigabe des Fangbandes 13 am Ende eine gemeinsame Ventilationsöffnung 26 in der beschriebenen Form ein.The embodiment finally shown in FIGS. 13 to 15 shows a combination of the embodiments described above with regard to the attachment of the standard ventilation opening, in which on the one hand, a stop hole as a standard ventilation opening 25 is formed from the outset, while additionally the slot 1 1 has a slot portion 24 for forming a standard ventilation opening under pressure. Here too, upon release of the tether 13 at the end of a common ventilation opening 26 in the form described.
Die in der vorstehenden Beschreibung, den Patentansprüchen, der Zusammenfassung und der Zeichnung offenbarten Merkmale des Gegenstandes dieser Unterlagen können einzeln als auch in beliebigen Kombinationen untereinander für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesentlich sein. The features disclosed in the foregoing description, the claims, the abstract and the drawings of the subject matter of these documents may be essential individually as well as in any combination with each other for the realization of the invention in its various embodiments.

Claims

P a t e n t a n s p r ü c h eP a n t a n s p r e c h e
Gassackmodul zum Einbau in ein Kraftfahrzeug mit einem aus einemAirbag module for installation in a motor vehicle with one of a
Gassackgewebe gebildeten Gassack und mit einer Aufblasvorrichtung für den vor Auslösung eingefalteten Gassack, wobei der Gassack wenigstens eine adaptive Ventilationsöffnung aufweist, die in gefaltetem Zustand vor Aufblasen des Gassackes wenigstens teilweise in einem geschlossenen Zustand gehalten ist, und wobei ein mit seinem einen Ende lösbar an dem Gassackmodul oder einem fahrzeugfesten Teil gehaltertes und mit seinem anderen, die adaptive Ventilationsöffnung übergreifenden Ende fest mit dem Gassack verbundenes Fangband vorgesehen ist derart, dass bei aufgeblasenem Gassack vor der Freigabe des lösbar gehalterten Endes des Fangbandes das durch den Aufblasdruck gespannte Fangband eine Öffnung der adaptiven Ventilationsöffnung verhindert, dadurch gekennzeichnet, dass die adaptive Ventilationsöffnung (20) durch einen in das Gassackgewebe (10) eingeschnittenen Schlitz (1 1 ) gebildet ist, an dessen beiden Enden eine das Einreißen des Schlitzes ( 1 1 ) bei Druckbeanspruchung verhindernde Gestaltung (21 ) angeordnet ist und dass das an der Innenseite des Gassackes angeordnete und den Schlitz ( 1 1 ) als adaptive Ventilationsöffnung (20) übergreifende Fangband durch eine der Befestigungsstelle ( 15) seines einen Endes ( 14) bezüglich des Schlitzes ( 1 1 ) gegenüberliegend an dem Gassackgewebe angebrachte Sicherungsschlaufe ( 17) geführt und anschließend zu der Halterung an dem fahrzeugfesten Teil weitergeführt ist. Gas bag fabric formed gas bag and with an inflator for the folded before triggering airbag, wherein the gas bag has at least one adaptive ventilation opening, which is held in a folded state before inflation of the airbag at least partially in a closed state, and one with its one end releasably attached to the Gas bag module or a vehicle-fixed part supported and provided with his other, the adaptive ventilation opening cross-end firmly connected to the airbag tether is such that inflated airbag before releasing the releasably supported Eralter end of the tether the tense by the inflation pressure tether an opening of the adaptive ventilation opening prevents, characterized in that the adaptive ventilation opening (20) by a in the airbag fabric (10) cut slot (1 1) is formed at the two ends of a tearing of the slot (1 1) under compressive loading ve is arranged on the inside of the airbag and the slot (1 1) as an adaptive ventilation opening (20) cross tether by one of the attachment point (15) of its one end (14) with respect to the slot (1 1 ) is guided opposite to the gas bag fabric attached securing loop (17) and then continued to the holder on the vehicle-fixed part.
2. Gassackmodul nach Anspruch 1 , dadurch gekennzeichnet, dass die Sicherungsschlaufe ( 17) aus einem quer zur Verlaufsrichtung des Fangbandes ( 13) angeordneten und an seinen beiden äußeren Enden fest mit dem Gassackgewebe verbundenen Gewebestreifen (1 8) besteht.2. Airbag module according to claim 1, characterized in that the securing loop (17) arranged from a transverse to the direction of the tether (13) and at its two outer ends fixed to the airbag fabric fabric strip (1 8).
3. Gassackmodul nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die das Ende ( 16) des Fangbandes (13) aufnehmende Halterung an einem im Inneren des Gassackes liegenden Teil des Gassackmoduls angeschlagen ist.3. Airbag module according to claim 1 or 2, characterized in that the end (16) of the tether (13) receiving holder is struck at a lying in the interior of the airbag portion of the airbag module.
4. Gassackmodul nach einem der Ansprüche 1 bis 3 , dadurch gekennzeichnet, dass die Gestaltung aus einer quer zur Längserstreckung des Schlitzes ( 1 1 ) verlaufenden Quernaht besteht.4. Airbag module according to one of claims 1 to 3, characterized in that the design consists of a transverse to the longitudinal extent of the slot (1 1) extending transverse seam.
5. Gassackmodul nach einem der Ansprüche 1 bis 3 , dadurch gekennzeichnet, dass die Gestaltung aus einem am Ende des Schlitzes ( 1 1 ) angeordneten Stopploch (21 ) besteht.5. Airbag module according to one of claims 1 to 3, characterized in that the design consists of a at the end of the slot (1 1) arranged stop hole (21).
6. Gassackmodul nach einem der Ansprüche 1 bis 5 , dadurch gekennzeichnet, dass der Schlitz (1 1 ) eine derartige Länge aufweist, dass sich ein durch das Fangband ( 13) bis zur Freigabe des Fangbandes geschlossen gehaltener Schlitzabschnitt (23) und wenigstens ein sich bei aufgeblasenem Gassack unter Druckeinwirkung öffnender und eine Standard-Ventilationsöffnung (25) ausbildender Schlitzabschnitt (24) einstellen.6. Airbag module according to one of claims 1 to 5, characterized in that the slot (1 1) has a length such that a by the tether (13) closed until the release of the tether held slot portion (23) and at least one when the gas bag is inflated, open the slot section (24) that opens under pressure and forms a standard ventilation opening (25).
7. Gassackmodul nach Anspruch 6, dadurch gekennzeichnet, dass das Fangband ( 13) den Schlitz ( 1 1 ) in einer mittigen Anordnung dazu übergreift und sich an beiden Enden des Schlitzes ( 1 1 ) jeweils Standard-Ventlationsöffnungen (25) ausbilden. 7. The gas bag module according to claim 6, characterized in that the tether (13) engages over the slot (1 1) in a central arrangement and at both ends of the slot (1 1) each form standard Ventlationsöffnungen (25).
8. Gassackmodul nach Anspruch 6, dadurch gekennzeichnet, dass das Fangband ( 13) den Schlitz ( 1 1 ) in dessen einem Endbereich übergreift und sich in dem anderen Endbereich die Standard-Ventilationsöffnung (25) ausbildet.8. Airbag module according to claim 6, characterized in that the tether (13) engages over the slot (1 1) in one end region and in the other end region, the standard ventilation opening (25) is formed.
9. Gassackmodul nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass eines der beiden Stopplöcher (21 ) als bei entfaltetem Gassack ständig offene Standard-Ventilationsöffnung (27) ausgebildet ist.9. Airbag module according to one of claims 5 to 8, characterized in that one of the two stop holes (21) is formed as in unfolded airbag constantly open standard ventilation opening (27).
1 0. Gassackmodul nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, dass beide Stopplöcher als bei entfaltetem Gassack ständig offene Standard-Ventilationsöffnungen ausgebildet sind.1 0. Airbag module according to one of claims 5 to 8, characterized in that both stop holes are formed as in unfolded airbag constantly open standard ventilation openings.
1 1 . Gassackmodul nach wenigstens einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass bei einer mittigen Anordnung des den Schlitz ( 1 1 ) übergreifenden Fangbandes (13) das an einem Ende des Schlitzes ( 1 1 ) ausgebildete Stopploch (21 ) als bei entfaltetem Gassack ständig offene Standard-Ventilationsöffnung (25) ausgebildet ist und der das andere Ende des Schlitzes bildende Schlitzbereich sich bei Druckeinwirkung zu einer zweiten Standard-Ventilationsöffnung (25, 27) öffnet, wobei der bei Druckeinwirkung zwischen den Ventilationsöffnungen gelegene, von dem Fangband ( 13) übergriffene Schlitzbereich (23) bei Freigabe des Fangbandes (13) freigegeben wird, so dass danach eine einzige Ventilationsöffnung (26) mit entsprechender Abmessung gebildet ist.1 1. Airbag module according to at least one of the preceding claims, characterized in that in a central arrangement of the slot (1 1) cross-tether (13) at one end of the slot (1 1) formed stop hole (21) as a deployed gas bag constantly open standard -Ventilationsöffnung (25) is formed and the slit region forming the other end of the slot opens under pressure to a second standard ventilation opening (25, 27), wherein located at the pressure between the ventilation openings located by the tether (13) slot area ( 23) is released upon release of the tether (13), so that thereafter a single ventilation opening (26) is formed with a corresponding dimension.
12. Gassackmodul nach einem der Ansprüche 1 bis 1 1 , dadurch gekennzeichnet, dass der Schlitz ( 1 1 ) von einer die Gewebebereiche beidseits des Schlitzes (1 1 ) erfassenden Reißnaht übergriffen ist. 12. Airbag module according to one of claims 1 to 1 1, characterized in that the slot (1 1) is overlapped by a tissue regions on both sides of the slot (1 1) detecting tear seam.
EP10713581.6A 2009-04-21 2010-04-09 Airbag module with an adaptive vent opening Active EP2421727B1 (en)

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DE102009018159A DE102009018159A1 (en) 2009-04-21 2009-04-21 Airbag module with an adaptive ventilation opening having gas bag
PCT/EP2010/002210 WO2010121717A1 (en) 2009-04-21 2010-04-09 Airbag module having an airbag with an adaptive ventilation opening

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US20120038138A1 (en) 2012-02-16
WO2010121717A1 (en) 2010-10-28
EP2421727B1 (en) 2013-08-21
JP5372242B2 (en) 2013-12-18
JP2012523990A (en) 2012-10-11
CN102405157B (en) 2013-12-11
US8651521B2 (en) 2014-02-18
DE102009018159A1 (en) 2010-11-04
CN102405157A (en) 2012-04-04

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